diff --git a/froglike6/README.md b/froglike6/README.md
index 90f5cd8..3e35a97 100644
--- a/froglike6/README.md
+++ b/froglike6/README.md
@@ -13,4 +13,5 @@
  | 9차시 | 2025.04.30 | 기하학 | [평행사변형](https://www.acmicpc.net/problem/1064)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/34|
  | 10차시 | 2025.05.08 | 이분탐색 | [게임](https://www.acmicpc.net/problem/1072)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/42|
  | 11차시 | 2025.05.08 | 조합론 | [High Towers](https://www.acmicpc.net/problem/33785)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/43|
+ | 12차시 | 2025.05.11 | 자료 구조 | [AC](https://www.acmicpc.net/problem/5430)|https://github.com/AlgoLeadMe/AlgoLeadMe-13/pull/46|
  ---
diff --git a/froglike6/data_structure/5430.py b/froglike6/data_structure/5430.py
new file mode 100644
index 0000000..aabd578
--- /dev/null
+++ b/froglike6/data_structure/5430.py
@@ -0,0 +1,30 @@
+from collections import deque
+import sys
+input = sys.stdin.readline
+
+for _ in range(int(input())):
+    func = input().rstrip()
+    if int(input()) == 0:
+        arr = deque()
+        input()
+    else:
+        arr = deque(map(int, input()[1:-2].split(",")))
+    rev = False
+    err = False
+    for i in func:
+        if i == "R":
+            rev = not rev
+        else:
+            if not arr:
+                print("error")
+                err = True
+                break
+            elif rev:
+                arr.pop()
+            else:
+                arr.popleft()
+        
+    if not err:
+        if rev:
+            arr.reverse()
+        print(f"[{','.join(map(str, arr))}]")
\ No newline at end of file